The Collaborative International Dictionary of English v.0.48:
Dor \Dor\, n. [Cf. Dor a beetle, and Hum, Humbug.] A trick, joke, or deception. --Beau. & Fl. [1913 Webster] To give one the dor, to make a fool of him. [Archaic] --P. Fletcher. [1913 Webster]